Counting by 10s Number Patterns Worksheet for Grade 1

Adding 10 creates a pattern children can see in the digits: the tens digit changes while the ones digit usually stays the same. This Grade 1 worksheet turns that place-value observation into practical sequence work. Rows begin with numbers such as 12, 7, 25, and 3, so learners cannot solve every item by reciting 10, 20, 30.

What children practise

In the first section, learners extend eight patterns by three numbers. The second section places missing values before, between, and after printed numbers. Number trains ask children to follow the same +10 rule across connected cars. A four-part challenge includes before-and-after numbers in an add-10 pattern, a longer row, five jumps from 23, and a next-number choice.

Use place value to explain +10

Write 23, 33, 43 vertically. Circle the ones digit in each number. The 3 stays the same because adding one group of ten does not add any ones. Then underline the tens digits 2, 3, and 4. They increase by one. This visual explanation is more useful than telling a child simply to “put 10 more.”

For a worked example, begin with 14. One ten more is 24; another ten is 34; then 44. Ask the child to check both features: the ones digit remains 4, and the total increases rather than decreases.

What mistakes can tell you

• 14, 24, 35: the child notices growth but is not preserving the ones digit.
• 60, 70, 80, 100: the learner may skip 90 when crossing toward 100.
• 19, 29, 39, 40: the child changed only one digit instead of adding a full ten.
• Correct digits in reverse order: separate place-value understanding from numeral-writing difficulty.

Support without giving away the answers

Let the learner use a hundred chart and move down one row on a standard ten-column chart. Ask what stays the same in the column. When confidence improves, cover the chart and have the child predict the next number before checking. For extension, start at 6 and continue beyond 100, naming what remains constant.

Answers and related practice

Check that each pair differs by 10 and that the ones digit stays constant. The shared Continue a Pattern answer key includes the trains and challenge items as well as the main rows. Learners who need dedicated skip-counting practice can use our Counting by 10s worksheets. To decide among +1, +2, +5, and +10 rules on one page, move next to the mixed continue-a-pattern worksheet.